JP2000118567A - Bag - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a bag which can be easily torn off by hands and a mouth can be reliably opened at a predetermined position by providing a plurality of half cuts in parallel at a position to be tear-opened and by forming a cut at an end of the position to be torn off. SOLUTION: The bag 10 with peripheries of surface and rear base materials 1 sealed by a seal 4 comprises a plurality of half cuts 3 provided in parallel adjacently at a position 2 to be tear-opened while a notch 5 comprising an I-shaped cut in parallel to the half cuts 3 is formed at an end of the seal 4 at the position 2 to be tear-opened. Thus even if force applied to the half cuts 3 varies from that applied to the notch 5, tearing from the notch 5 at the time of unsealing immediately intersects with either of the plurality of the half cuts 3, whereby the bag can be reliably torn off along the half cuts 3 to form an opening.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bag which can be easily torn and opened by hand.

[0002]

2. Description of the Related Art Bags, such as standing pouches, which are filled and sealed with detergents, foodstuffs, etc., should be opened in place of a costly, strongly stretched film in order to improve the openability by tearing. There is one in which one half cut is provided at a position and a cut is formed at the end of the seal portion of the bag body on the same line as the half cut.

[0003]

In a bag having a half cut and a cut as described above, the half cut is formed by laser processing, and the cut is formed by a cutter.
There is a case where a position shift occurs between the half cut and the cut, and a sufficient tear property cannot be obtained.

[0004] In order to solve such a problem, an object of the present invention is to provide a bag which can reliably obtain sufficient tearability at low cost.

[0005]

SUMMARY OF THE INVENTION The present invention is directed to a bag having a seal and having a mouth formed by tearing,
Provided is a bag body in which a plurality of half cuts are juxtaposed at a portion to be torn and a cut is formed at an end of a seal portion at the portion to be torn.

[0006]

FIG. 1 shows an embodiment of the bag of the present invention in a sealed state filled with contents.

The bag 10 is sealed by sealing the peripheral edges of the base material 1 on the front and back, and a plurality of half cuts 3 are juxtaposed adjacent to the site 2 to be torn. At the end of the seal portion 4 at the portion 2 to be torn, a notch 5 formed of an I-shaped cut parallel to the half cut 3 is formed. Therefore, according to the bag body 10, even if the position where the half cut 3 and the notch 5 are formed is displaced, and if the force applied to the notch 5 at the time of tearing varies, the notch at the time of opening The tear from 5 immediately intersects any of the half cuts 3. Therefore, the bag body 10 can be reliably torn along the half cut 3 to form a mouth. This also makes it possible to use, as the substrate 1, a material in which the strongly stretched film is omitted from the layer configuration.

The half cut 3 can be provided by forming a groove in the surface layer of the substrate 1 by laser processing. In the bag 10 of FIG. 1, the half cut 3 is a continuous straight line from the seal 4 on one side of the bag 10 to the seal 4 on the other side. For this reason, each half cut 3 may be discontinuous in the middle or may not be a straight line. The number of half cuts 3 is half cut 3
It is preferable that the number is about 3 to 6 depending on the interval between each other.

The position where the notch 5 is formed in the seal portion 4 is as follows.
It is preferable that the center of the plurality of half cuts 3 is substantially the center. The notch 5 can be formed on one or both of the seal portions 4 on both sides 6.

FIG. 2A is a plan view of the notch 5 of the bag 10 of FIG. 1 with the notch 5 skewed with respect to the half cut 3. When skewed in this manner, the direction in which the base material 1 is torn by the notch 5 always intersects with the half cut 3, so that the base material 1 can be more reliably torn along the half cut 3 when the bag is opened. it can. As a notch having a cut obliquely inclined with respect to the half cut 3, a V-shaped notch _5V may be formed as shown in FIG.

In addition, in the present invention, the size and shape of the cut are not particularly limited, and a cut such as a U-shaped cut may be formed.

In the present invention, the width of the seal portion in which the cut is formed is made wider than the width of the seal portion of the bag body, and the length of the cut in the width direction of the seal portion is reduced. It is preferable that the width be longer than the width of the sealing portion of the body. For example, FIG.
(A), the width W _a of the portion 4a of the notch 5 _V of the sealing portion 4 of the side edges 6 are formed, and wider than the width W _b of the bag body portion of the seal portion 4b, The length L of the notch 5 _{V in} the width direction of the seal portion is determined by the width W _b of the seal portion 4 b of the bag body.
As shown in FIG. 3 (b), not only the seal portion 4a where the notch _5V is formed but also the seal portion 4c from there to the upper side 7 of the bag body may be used. It may be formed wider than the sealing portion 4b of the body. In this way, by providing the portion 4 d having the sealing width protruding in the seal portion 4 of the side 6 and providing the cut therein, it becomes easy to orient the tear by the cut in the same direction as the half cut 3. .

The bag of the present invention has been described with reference to the drawings. In addition, the bag of the present invention can take various forms, including the shape of the base material constituting the bag and the outer shape of the bag. Is not particularly limited.

[0014]

The bag of the present invention can easily and reliably open the mouth at a predetermined position by tearing without using a laminated material having a strongly stretched film in a layer structure as a base material. It becomes possible.

[Brief description of the drawings]

FIG. 1 is a plan view of a bag of the present invention in a sealed state.

FIG. 2 is a plan view of a notch portion of the bag of the present invention.

FIG. 3 is a plan view of a notch portion of the bag of the present invention.

[Explanation of symbols]

REFERENCE SIGNS LIST 1 base material 2 part to be torn 3 half cut 4 seal part 4a seal part with notch formed 4b seal part of bag body part 4c seal part from part where notch is formed to upper side 5 notch 5 _V V bag W _a notch length in the width direction of the notch width L seal portion of the seal portion of the width W _b bag body portion of the seal portion is formed in the mold notches 10 present invention

Claims (3)

[Claims] 1. A bag having a seal portion and having a mouth formed by tearing, wherein a plurality of half cuts are juxtaposed at a portion to be torn and a seal portion at a portion to be torn. A bag having a notch formed at an end of the bag. 2. The bag according to claim 1, wherein the cut is oblique to the half cut. 3. The width of the seal portion in which the cut is formed,
2. The bag according to claim 1, wherein the width of the cut in the width direction of the seal is longer than the width of the seal of the bag body.